im 18 first off. im trying to live on my own with no family help so eating healthy is hard but im not starving, and i know poor eating habits can alter your monthly visit buuuuut my eating habits arent much different from when i did have a home so yeah. and my period is normally very regular. i can tell when im ovulating and i know when and what day my period is going to start and roughly when it will end.

but this past month it has been acting up.

ive been having unprotected sex with my boyfriend.. often. we have been having sex for 7 months or so and i have never gotten pregnant. about two weeks before my period i spotted a little bit of pinkish fluids. it stopped and then when my period was supposed to start i just started spotting again for a few days, [[not even worth the cost of tampons for the most part]] i had mild cramps and back aches. now its gone and still no actual period. im not really having a bunch of signs that would point to pregnancy but my tummy is slowly getting bigger and im constantly exhausted and get nausous randomly like, after a cig or when im just sitting on the couch.

any ideas of what i should do?